Lensboard drilling tool...

Here's something a bit different...

... A Birdcage Awl ...
An age-old technique re-invented for the large format photographer.
A few twists creates a tapered hole to match the taper of #4 to #7 screws.
Avoids wood splitting, no raised ridge around the screw.
The lens seats squarely against the lensboard.
You could make your own. But if you'd rather not, here's a nice one...